Apparatus for controlling the flow of liquids.



A. PRIESTMAN. V APPARATUS FOR CONTROLLING THE PLOW 0F LIQUIDS.

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989,047. Patented Apr. 11, 19 11.

R Ai warm ALBERT PRIES'IMAN, 0F PHILADELPHIA, PENNSYLVANIA.

APPARATUS FOR CONTROLLING THE FLOW OF LIQUIDS.

Specification of Letters Patent.

Application filed October 20, 1909.

Patented Apr. 11, 1911. Serial No. 523,680.

To all whom it may concern:

Be it known that I, ALBERT PRIESTMAN, a subject of the King of GreatBritain and Ireland, and a resident of the city and county ofPhiladelphia and State of Pennsylvania, have invented an Improvement inApparatus for Controlling the Flow of Liquids, of which the following isa specification.

In many instances it is desirable to vary the quantity of liquiddischarged proportionally to variations in the area supplied. This isparticularly desirable in connection with sewage disposal systems inwhich the sewage is distributed by a sprinkler or nozzle upon thesurface of'a filter bed. To obtain uniform treatment of the sewage, itis necessary that it shall be distributed evenly on the bed. This cannotbe accomplished with stationary nozzles by simply increasing anddecreasing the radius of the spread without any variation in thequantity of liquid discharged, since the areas supplied will varydirectly with the squares of the radii of the spread, and if thequantity discharged is constant for all radii, less liquid per surfaceunit will be distributed over the surface of the bed in greater areasthan will be distributed overthe surface in less areas.

To obtain the even distribution of liquid it is necessary to vary thequantity of the liquid discharged proportionally with the spread or areasupplied. As the radius of the spread-and consequently the areasupplied-decreases, the quantity of liquid discharged must decrease, andvice versa. This result I accomplish by supplying the liquid to thenozzle from a tank or liquid con tainer of decreasing capacity orhorizontal dimension from the top to bottom, which acts to decrease thevolume of liquid outflow proportionately to the diminutionof areassuccessively supplied with liquid through the nozzle during the emptyingof the container.

In the drawing is shown a vertical sectional view of the apparatus.

6 is the main feed pipe through which the sewage or liquid is suppliedto the nozzle d, or other distributing device. This pipe 5 leads fromthe lower part of a liquid chamber h.

f is the liquid tank or container which has a portion of decreasingcapacity and acts as the means for decreasing the volume of liquidoutflow proportionately to the diminution of the areas successivelysupplied through the nozzle. As shown, the walls f are inclined so thatthe tank has a portion of decreasing horizontal dimension from its topto its bottom.

g is a siphon for discharging the liquid from the tank f to the chamberIL. The

intake end of tlie siphon is located with its receiving end at thesmallest or lowest part of the tank f, and the discharge end is in thelowest part of the chamber h. While the discharge of the liquid at thenozzle d is controlled by the head of liquid in the chamber it, thathead is controlled by the flow through the siphon g, and as that flow iscontrolled by the portion f of varying horizontal dimension from the topto bottom, the liquid outflow from the nozzle (Z will varyproportionately with the areas successively supplied through saidnozzle.

I have shown the siphon provided with air pipes for automaticallycontrolling its operation.

z' is a pipe leading from near the intake end of the siphon up above theliquid level and then down through the discharge-leg and terminating ata distance above its end.

j is an air pipe leading from the crown of the siphon up above thenormal liquid level, and then down in the discharge chamher it where itterminates in a liquid seal 7" at the level of the outlet to the pipe 6.

What I claim is as follows:

1. In combination, a liquid container, a siphon for-discharging thecontents of the same and a nozzle connected with the discharge end ofthe siphon, the said container having a liquid containing portion ofdecreasing horizontal dimension from its top to its bottom, and theintake limb of the siphon being located with its receiving end at thelowest and smallest part of the conof said liquid container to thechamber, and tainer. anozzle supplied from said chamber. 10

2. In apparatus for controlling the flow of In testimony of whichinvention I hereliquid, the combination of a liquid container unto setmy hand. 5 having a portion of decreasing horizontal ALBERT PRIESTMAN.

dimension from its top to its bottom, a Witnesses: liquid chamber, asiphon for discharging ERNEST HOWARD HUNTER, the liquid from the lowestand smallest part JOSEPH" H. SUNDHEIM.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

